Auto Makers Count on Continuing Truck Demand: U.S. auto makers, responding to the growing popularity and brisk sales of minivans and pickups, will build 19.5% more trucks in the final quarter of the year than they did in late 1991. The number of U.S.-built cars, however, will be up only slightly during the quarter from the depressed levels of a year ago, auto industry analysts said. Ford plans to build 406,000 trucks in the quarter, up from last year's 332,000. Chrysler plans to make 222,000 trucks, compared to 160,000 last year. General Motors will build 360,000 trucks, compared to 341,000 in October-December, 1991.